BTW- i found this on MotorTrend.... Quoted exactly:

"2004 Toyota Sienna: Redesign. Sienna replacement expected to be bigger to compete with Honda Odyssey and Dodge Caravan. Drivetrain to feature 3.5-liter V-6 with available all-wheel drive."

I never heard anything about a 3.5V6, i thought it was a 3.3V6. Maybe typo?? But all wheel drive will be something new.

MotorTrend Article

And if you look around on the other pages there, they say the Lexus's i.e. ES300/RX300 are getting the 3.3 so the Sienna must be getting that as well. And they give 240HP to both the ES/RX. So expect the Sienna to be in that range, as well as Camry/Highlander etc....